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Full Discussion: Difference between 2 dates
Top Forums Shell Programming and Scripting Difference between 2 dates Post 302832821 by Don Cragun on Monday 15th of July 2013 08:44:23 PM
Old 07-15-2013
In message #1 in this thread, you show a comma separated file with dates in day/month/year format. (And you have "t60" as a sample dividend.)

In message #3 in this thread, you show a space separated file with dates in year-month-day format.

Are these two different problems mixed into one thread? Is the program you want created for you supposed to handle both input formats? Are there other input formats?

Your use of 365.25 and 30.5 inside $((...)) imply that sh on your system is a 1993 or later version of the Korn shell. Assuming that is correct and that the calculations in the script you showed in message #3 are accurate enough for what you're trying to do, that script can be made MUCH faster by letting the shell perform the field splitting instead of using so many invocations of cut. Try replacing:
Code:
year1=`echo $x|cut -d- -f1`
month1=`echo $x|cut -d- -f2`
day1=`echo $x|cut -d- -f3|cut -d" " -f1`
lhr1=`echo $x|cut -d: -f1|cut -d" " -f2`
lmin1=`echo $x|cut -d: -f2`
lsec1=`echo $x|cut -d: -f3`
year2=`echo $y|cut -d- -f1`
month2=`echo $y|cut -d- -f2`
day2=`echo $y|cut -d- -f3|cut -d" " -f1`
lhr2=`echo $y|cut -d: -f1|cut -d" " -f2`
lmin2=`echo $y|cut -d: -f2`
lsec2=`echo $y|cut -d: -f3`

in timediffcalc.sh with:
Code:
OIFS="$IFS"
IFS=" -:"
set -- $2 $3 $4 $5
IFS="$OIFS"
year1=$1
month1=$2
day1=$3
lhr1=$4
lmin1=$5
lsec1=$6
year2=$7
month2=$8
day2=$9
lhr2=${10}
lmin2=${11}
lsec2=${12}

This User Gave Thanks to Don Cragun For This Post:
vsachan
 

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LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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